@article{VMUMM_2000_6_a3,
     author = {S. A. Bogatyi},
     title = {Universal homogeneous ultrametric on the space of irrational numbers},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {20--24},
     publisher = {mathdoc},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2000_6_a3/}
}